Questions Asked on
December 6, 2010

  1. chemistry! URGENT!!!

    A gaseous mixture of O2 and N2 contains 30.8 % nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 365 mmHg?

    asked by chelsey
  2. Chemistry

    Diethyl ether has a boiling point of 34.5C, and 1-butanol has a boiling point of 117C. Both of these compounds have the same numbers and types of atoms. Explain the difference in their boiling points. The answer I found was that: only 1-butanol can form

    asked by Sara
  3. physics

    Two identical containers are open at the top and are connected at the bottom via a tube of negligible volume and a valve which is closed. Both containers are filled initially to the same height of 1.00 m, one with water, the other with mercury, as the

    asked by maria
  4. chemistry

    Find the percent by mass of sodium chloride in a 1.35 M NaCl solution. The density of the solution is 1.06 g/mL..............how do I go about doing this question thanks!

    asked by wade
  5. Chemistry

    What is the molarity of the resulting solution when 300. mL of a 0.400 M solution is diluted to 800. mL?

    asked by Ivy
  6. chemistry

    What volume of a concentrated HCl solution, which is 36.0% HCl by mass and has a density of 1.179 g/mL, should be used to make 4.60 L of an HCl solution with a of 1.9? HELP!!!

    asked by Stacy
  7. chemistry

    how many grams of Na2CO3 must be dissolved into 155 g of water to create a solution with the molality of 8.20 mol/kg?

    asked by william
  8. Physics Help please

    The free-fall acceleration on Mars is 3.7 m/s2. (a) What length pendulum has a period of 4 s on the earth? cm What length pendulum would have a 4 s period on Mars? cm (b) A mass is suspended from a spring with force constant 10 N/m. Find the mass suspended

    asked by Anonymous
  9. Chemistry

    What is the concentration of a H2SO4 solution if 10.0 mL of the solution is neutralized by 7.8 mL of a 0.20 M NaOH solution?

    asked by Ivy
  10. chem110

    What is the value of the smallest bond angle in XeF4?

    asked by sam
  11. Chemistry

    At the melting point of benzene, the DH of fusion is 9.95 kJ/mol and the DS of fusion is 35.7 J/K.mol. What is the temperature at which benzene melts?

    asked by Ashley
  12. Physics

    A diver runs horizontally off the end of a diving board with an initial speed of 1.25 m/s. If the diving board is 3.20 m above the water, what is the diver's speed just before she enters the water? (Neglect air resistance.)

    asked by amv3WEBASSIGN
  13. calculus

    Determine whether the sequence is arithmetic. If so, find the common difference. (Assume that n begins with 1.)a n=2(1/5)n

    asked by yea nah
  14. physics

    two identical objects move with speeds of 5.0 m s and 25.0 m s. What is the ratio of their kinetic energies?

    asked by Anonymous
  15. colllege chemistry

    for the haber process for the synthesis of ammonia: N2(g)+ 3H2(g)= 2NH3(g), what is ΔG (kJ/mol) at298 K for a reaction mixture that consists of 1.5 atm N2,3 atm H2 and 1.8 atm NH3? [ΔG° f(NH3)= -16.66kJ/mol]

    asked by ramona
  16. college

    A train is heading due west from St. Louis. At noon, a plane flying horizontally due north at a fixed altitude of 4 miles passes directly over the train. When the train has traveled another mile, it is going 80 mph, and the plane has traveled another 5

    asked by Joshua
  17. PHI

    4. Reporter: A new campaign finance reform bill being considered by Congress would limit the amount of campaign contributions that political candidates can receive. However, a survey of candidates running for mayor, governor, and senate seats shows that

    asked by Susan
  18. Chemistry

    Which of the following gases would you keep in an outdoor storage tank in winter? Explain why. methane(CH4), Propane(C3H8), or butane(C4H10)

    asked by Sara
  19. Chemistry

    What happens to the sample's reported water content if the salt decomposes yielding a volatile product? If the water is not completely removed from the salt during the heating process, will the reported water-to-salt mole ratio be high or low? Explain

    asked by Allison
  20. Physics

    A 500 g block is released from rest and slides down a frictionless track that begins h = 1.70 m above the horizontal, as shown in Figure P13.56. At the bottom of the track, where the surface is horizontal, the block strikes and sticks to a light spring

    asked by Anonymous
  21. Physics

    Suppose a monatomic ideal gas is changed from state A to state D by one of the processes shown on the PV diagram. Find the total work done on the gas if it follows the constant temperature path A-C followed by the constant pressure path C-D. A = 2atm and

    asked by Dan
  22. Calculus

    Find the point on the graph of y=2x-4 that is closest to the point (1,3). (Optimization equation)

    asked by Michelle
  23. Physics

    A sign is supported at its top right corner, point P. The sign is a square with 40 cm on each side and has 8.0 kg mass. What is the magnitude of the horizontal force that P experiences?

    asked by Steve
  24. Chemistry

    What mass of silver nitrate is dissolved in 40.0 mL of a 0.400 M solution of silver nitrate?

    asked by Ivy
  25. chemistry

    A compound,KBrOx, is analyzed and found to contain 52.92% Br by mass. What is the value of x?

    asked by anne
  26. chemistry

    What is the expected van't Hoff factor for NaC2H3O2 in an aqueous solution, assuming 100% dissociation.

    asked by kyle
  27. college Chemistry

    (Questions 6 and 7) For the following elements list the electron configuration. Assume it is neutral and in its ground state. 6. Fluorine (a) 1s22s22p1 (b) 1s22s22p63s1 (c) 1s22s22p5 (d) 1s22s22p63s23p64s1 (e) 1s22s1 7. Gallium

    asked by Jay
  28. College Chemistry

    The value of ΔG°f at 25°C for gaseous mercury is 31.85 KJ/mol. What is the vapor pressure of mercury at 25°C? [Hint: calculate the Kp for the reaction Hg(l)=Hg(g)]

    asked by alice
  29. Calculus

    one ship (A) is sailing due south at 16 miles per hour and a second ship (B), 32 miles south of A, is sailing due east at 12 miles per hour. At what rate are they approaching at the end of 1 hour?

    asked by Gabby
  30. College algebra

    A person is driving a car on a straight road. The graph shows the distance in y miles that the individual is from home after x hours. the graph has the following points (1, 40) and (3, 90) Find the slope intercept of the line y = ____x + ______ How fast is

    asked by Lee
  31. Chemistry!

    A sealed flask contains 0.60 g of water at 28 degrees celcius. The vapor pressure of water at this temperature is 28.36 mmHg. What is the minimum volume of the flask in order that no liquid water be present in the flask?

    asked by BillNyeTheScienceGuy
  32. college Chemistry

    What is the mole of oxalic acid? Equation:H2C2O4 + 2NaOH---> Na2C2O4 + 2H2O *Moles of oxalic acid dihydrate is 0.032 mole. * Molarity of oxalic acid solution is 0.128 M oxalic acid solution. * Initial volume of Oxalic acid is 19.8 ml and Final volume is

    asked by Ivy
  33. physics

    A driver is running 3.6 m/s and dives out horizontally from the edge of a vertical cliff and reaches the water below 2.0s later. A) How high was the cliff? B) How far from its base did the driver hit the water?

    asked by Catherine
  34. physics

    Resonance of sound waves can be produced within an aluminum rod by holding the rod at its midpoint and stroking it with an alcohol-saturated paper towel. In this resonance mode, the middle of the rod is a node while the ends are antinodes; no other nodes

    asked by Erica--help!
  35. Honor Biology

    In an experiment, plants were grown under colored filters that allowed equal amounts of light of different colors to strike different plants. Under which filter do you think plants grew the slowest? Why?

    asked by Pam
  36. physics

    A 0.50 kg ball that is tied to the end of a 1.4 m light cord is revolved in a horizontal plane with the cord making a 30° angle with the vertical. determine the balls speed.

    asked by kaitlyn
  37. math

    If she made the last free throw, then her probability of making the next one is 0.9. On the other hand, If she missed the last free throw, then her probability of making the next one is 0.5. Find the long-run free-throw shooting probabilities for this

    asked by Tiff
  38. math/algebra

    1. Which of the following inequality signs would make a true statement if it replaced the question mark in the following equation? 3− 5?− 3 A. < C. ≤ B. > D. = 2. Solve the inequality −4y + 6 2 C. y ≤ 5 B. y < 5 D. y > 5 4. At a baseball game,

    asked by student-visitor
  39. physics

    A 0.50 kg ball that is tied to the end of a 1.4 m light cord is revolved in a horizontal plane with the cord making a 30° angle with the vertical. (b) If the ball is revolved so that its speed is 4.0 m/s, what angle does the cord make with the vertical?

    asked by kaitlyn
  40. physics

    A 0.50 kg ball that is tied to the end of a 1.4 m light cord is revolved in a horizontal plane with the cord making a 30° angle with the vertical. (b) If the ball is revolved so that its speed is 4.0 m/s, what angle does the cord make with the vertical?

    asked by kaitlyn
  41. college

    If two indistinguishable dice are rolled, what is the probability of the event {(2, 2), (3, 2), (1, 2)}?

    asked by Daniel
  42. Chemistry

    A 120. mL sample of a gas is at a pressure of 1.50 atm. If the temperature remains constant, what will be its volume at 3.50 atm of pressure?

    asked by Ivy
  43. physics

    A compact car, mass 705 kg, is moving at 1.00 102 km/h toward the east. Sketch the moving car. Do this on paper. Your instructor may ask you to turn in this work.. (a) Find the magnitude and direction of its momentum. Draw an arrow on your sketch showing

    asked by max
  44. Honor Biology

    ATP is used to power the movement of your muscles as you turn the pages of a book. Where did the energy in the ATP come from? Trace the energy in the ATP molecule back to the sun.

    asked by Pam
  45. physics

    A 8.5-kg bowling ball is rolling down the alley with a velocity of 3.5 m/s. For each impulse, a and b, as shown below, find the resulting speed and direction of motion of the bowling ball.

    asked by lets go
  46. physics

    block a of mass 4kg is on a horizontal, frictionless tabletop and is placed against a spring of negligible mass and spring constant 650n/m. the other end of the spring is attacked to a wall. the block is pushed toward the wall until the spring has been

    asked by kim
  47. college

    Figure 11-50 shows two examples of SHM, labeled A and B. (The vertical axis is marked in increments of 0.5 m and the horizontal axis is marked in increments of 1 s.)

    asked by Anonymous
  48. Physics

    A sign is supported at its top right corner, point P. The sign is a square with 40 cm on each side and has 8.0 kg mass. What is the magnitude of the horizontal force that P experiences?

    asked by Steve
  49. physics

    A 2200-kg sport utility vehicle traveling at 96 km/h can be stopped in 0.21 s if it hits a concrete wall. Assume a 60 kg person was in the car that hit this wall. The velocity of the person equals that of the car both before and after the crash, and the

    asked by lets go
  50. physics

    A compact car, mass 705 kg, is moving at 1.00 102 km/h toward the east. Sketch the moving car. Do this on paper. Your instructor may ask you to turn in this work.. (a) Find the magnitude and direction of its momentum. Draw an arrow on your sketch showing

    asked by max
  51. science

    where does horizontal sliding take place on the earth?

    asked by hunter
  52. Honor Biology

    Without oxygen, cellular respiration grinds to a standstill, although glycolysis can continue to make some ATP anaerobically for a short time. When oxygen runs out, why does electron transport stop? Why do you thing the Krebs cycle stops?

    asked by Pam
  53. physics

    A skier is coasting on perfectt smooth snow at 7.0 m/s and crosses a rough patch of snow 35m long. If the frictional force exerted on the skier is 6.0 N, what is her speed as she leaves the patch of snow? Assume the skier and her skis habe a mass of 90.0

    asked by Nia
  54. college chemistry

    what is the highest freezing point of H2O, NaCl, and HF

    asked by Anonymous
  55. math/probability

    The Probability of drawing two black balls in succession from a bag containing 4 red and 3 black balls when the ball first drawn is a) replaced b) not replaced

    asked by viru
  56. statistics

    The final rankings of the top 20 NCAA college basketball teams are an example of which level of measurement?

    asked by Anonymous
  57. Chemistry

    A 0.5962g sample of iron ore is dissolved in acid producing Fe3+. Through a series of reactions, the iron precipitates as the Fe(OH)3. The precipitate is heated, forming solid Fe2O3. What is the mass % of iron in the sample if the analysis produced 0.3210g

    asked by Chris
  58. Business

    Assignment for week 5 Given the following information, draw the project network. Compute the early, late and slack times for the project network. which activities are on the critical path have only the start or finish of the activity on the critical path?

    asked by Gloria
  59. Physics

    A object-spring system oscillates with an amplitude of 4.0 cm. If the spring constant is 210 N/m and object has a mass of 0.50 kg, determine each of the following values. (a) the mechanical energy of the system (b) the maximum speed of the object (c) the

    asked by Anonymous
  60. College Chemistry

    A 1.00-L solution saturated at 25°C with calcium oxalate (CaC2O4) contains 0.0061 g of CaC2O4. The solubility constant (Ksp) for this salt is [CaC2O4=128.09 g/mol]

    asked by Patrice
  61. earth

    Compare the patterns of earthquakes, colcanoes and mountain ranges on Earth.

    asked by Clammyson
  62. Chemistry

    Write a balanced redox reaction between mercury and bromine to form Hg2^2+.

    asked by Ari
  63. Chemistry

    If some volatile impurities in the crucible are removed from the hydrated MgSO4 along with the water, is the reported mass of water removed too high or too low. Explain.

    asked by Allison
  64. Chemistry

    Calculate the molarity of an aqueous NaOH soultion if 32.00ml of it is required to titrate. 0.6789 g of oxalic acid to phenolphthalein end point. The balanced chemical equation is H2C2O4 + 2NaOH-> Na2C2O4 + 2H2O

    asked by Sonya
  65. chem

    Can you please tell me if these are right? Determine the pH for the following solutions A [OH-] = 1.0 X 10^-7 M I got 7 B. [H3O+ = 4.2 X 10 ^-3M I got 2.4 C. [H3O+]= 0.0001M I got 4 D. [OH-] = 8.5 X10^-9M I got 5.9 What are the [H3O+] and [OH-] for a

    asked by Jessie
  66. english

    Plan a straight line ESA lesson for a language level of your choice, to cover vocabulary connected with the topic of food:

    asked by rahila
  67. Chemistry

    Gravimetric analysis does not always involve a precipitate. Consider the following problem. A mixture of calcium carbonate and calium oxide has a mass of 8.35 grams. When heated strongly, the CaCO3 in the sample decomposes into solid CaO and carbon dioxide

    asked by Josh
  68. chemistry

    I have no clue, please help and explain! =) Find the pH of a 0.150 M solution of a weak monoprotic acid having Ka=1.2×10−5. Find the percent dissociation of this solution. Find the pH of a 0.150 M solution of a weak monoprotic acid having

    asked by Lisa, Help needed!
  69. college Chemistry

    Decide if the molecule has a dipole moment, (if the molecule is polar) as follows: a) dipole (polar molecule) b) no dipole (non-polar molecule) c) ionic (not a molecule) d) super covalent e) none of the above 11.) CsF 12.) nitrogen 13.) Methane 14.)

    asked by Jay
  70. math(trig)

    1) A 6-ft propeller turns at 1200 revolutions per minute. Compare the angular velocity of the tip with the angular velocity at a point 10 in. from its center. 2) What is the angular velocity of a point on the tread of a 15-in. diameter tire on a car

    asked by confused
  71. Physics

    An oil droplet with a mass of 3.50 x 10^-15 kg accelerates downward at a rate of 2.50 m/s2 when it is between two horizontal charged plates that are 1.00 cm apart. Assuming that the excess charge on the droplet is negative and the top plate is positive,

    asked by Marium
  72. College Chemistry

    Calculate the molar solubility of Mn(OH)2 in grams per liter when buffered at pH 8.5 Mn(OH)2=88.953g/mol; Ksp=1.9 x 10^-13

    asked by Patrice
  73. Chemistry

    When 50.0 g of iron(3)nitrate, FE(NO3)3, is dissolved in water , the number of nitrate ions present in the solution is

    asked by Patrick
  74. Honor Biology

    After a biochemical analysis of the victim's tissues, brilliant biologist/criminal investigator J. C. Mickleberry announced his findings: "Contrary to the conclusions of the police, the victim did not suffocate. The electron carriers in his mitochondria

    asked by Pam
  75. Calc

    You need 50 pounds of two commodities costing $1.25 and$1.60 per pound. a) Verify that the total cost is y=1.25x + 1.60(50 - x), where x is the number of pounds of the less expensive commodity. b) Find the inverse function of the cost function.

    asked by Erica
  76. Algebra 2

    Need help on the #13-20. 13. What is the quotient of d − 2 ) d 4 − 6d 3 + d + 17 __________________ ? A. d 3 − 4d 2 − 8d − 15 R −13 B. d 3 − 8d 2 + 16d − 31 R 79 C. d 3 − 4d 2 + 9d + 35 D. d 3 − 8d 2 + 17d − 17 14. What is the sum of

    asked by Emily
  77. College algebra

    a company finds it can produce 15 heaters for $4300, while producing 20 heaters costs $5500. Express y, as a linear function of the number of heaters, y. Determine the cost to produce 30 heaters. y = _________ Cost to produce 30 heaters $_________ Help I'm

    asked by Lee
  78. physics

    An airplane traveling a constant 100.0 m/s is to drop supplies to flood victims isolated on a patch of land 200.0 m below. A) The supplies should be dropped how many seconds before the plane is directly overhead? B) What is the distance of the plane away

    asked by Catherine
  79. physics

    The drawing shows a hydraulic chamber in which a spring (spring constant = 1292 N/m) is attached to the input piston, and a rock of mass 24.7 kg rests on the output plunger. The piston and plunger are at the same height, and each has a negligible mass. By

    asked by josh
  80. Chemistry

    what volume of 2.50 M HCl in liters is needed to react completly(with noting left over) with .750 L of 0.500MNacCO3

    asked by Garrett
  81. Precalculus

    1.Write the expression as a sum or difference. cos(5x)cos(-4x) 2.Write the expression as a product. cos(4x)-cos(12x)

    asked by Anonymous
  82. Physics

    A bat can detect small objects, such as an insect, whose size is approximately equal to one wavelength of the sound the bat makes. If bats emit a chirp at a frequency of 50.0 kHz, and if the speed of sound in air is 340 m/s, what is the smallest insect a

    asked by Anonymous
  83. College Chemistry

    A 20.0 Ml sample of sulfuric acid is titrated with 25.0 ML of 1.0 M NaOH solution. What is the molarity of the sulfuric acid? H2SO4+ 2NaOH yields Na2SO4 + H2O

    asked by Sa ndra
  84. physics

    an arrow of mass .04 kg is pulled back 10 cm in the bow, having a force of 25.2 N. It is released 1.5m from the ground...how far will the arrow fly? (all of the energy from pulling it back converts into the flying arrow)

    asked by help
  85. physics

    A venturi meter is a device for measuring the speed of a fluid within a pipe. The drawing shows a gas flowing at a speed v2 through a horizontal section of pipe whose cross-sectional area A2 = 0.0900 m2. The gas has a density of ñ = 1.50 kg/m3. The

    asked by johnny
  86. Chemistry

    Write a nuclear equation for the following: Iodine 131 undergoes beta decay two times Plutonium 239 is an alpha emitter Th 234 undergoes beta decay once and then alpha decay How do I go about writing nuclear equations?

    asked by Jake
  87. Physics Light and Color

    The depth perception cue employed in the old-fashioned stereoscopes but not in plain photographs is: (a) variation in color, (b) variation in sharpness, (c) binocular disparity, (d) previous knowledge. (Choose one.)

    asked by Amanda
  88. english - the cay

    why didn't young phillip remember very much about his former home in virginia?

    asked by felicia
  89. college

    What are the methods of judicial selection for federal judges?

    asked by Robin
  90. social studies

    i need help on some questions: 1. How does totalitarian government gain power and maintain power? 2. What kind of freedoms does totalitarian government have? 3. Who is eligible to vote? 4. Who is in control? Who makes the decisions? how does this change if

    asked by needhelp
  91. statistics

    A study was conducted to investigate the relationship between the cost, y (in tens of thousands of dollars), per unit of equipment manufactured and the number of units produced per run, x. The resulting equation for the line of best fit is given below,

    asked by edwin
  92. College Chemistry

    The eqm. Constant for a reaction is 2.48 at 25°C. what is the value of ΔG° (kJ) at this temperature? (R=8.314 J/k mol)

    asked by Shanice
  93. chem

    how many molecules are in 1.00 kg of hydrazine, N2H4?

    asked by c1220
  94. Trigonometry

    Minimum force required to prevent a ball weighing 29.6 pounds from rolling down a ramp which is inclined 14.9 degrees with the horizon?

    asked by Casey Lewis
  95. social studies

    What was Alexander the greats'goal wheb he poured out drinking water offered to him ib the desert and what were the results?

    asked by Dianne
  96. Honor Biology

    Remember that the greater the concentration of hydrogen ions, the lower the pH of a solution. How do you suppose the pH of the solution in the thylakoid space compares with the pH of the solution in the stroma? What is responsible for the difference?

    asked by Pam
  97. chemistry

    The volume of an ideal gas is 2.06L at standard temperature and pressure. Calculate the volume at 1.75atm and 27oC

    asked by Lo
  98. algebra

    If the voltage V, in an electric circuit is held constant,the current,I,is inversely proportional to the resistance,R. If the current is 490 milliamperes when the resistance is 5 ohms,find the current when the resistance is 35 ohms.

    asked by jitka
  99. chem

    1. Explain the effects of the following factors on the relative reactivities of Sn1 and Sn2 reaction a.Nature of the carbon skeleton(primary, secondary, tertiary) b.Steric hindrance (primary vs hindered primary) c)Nature of the leaving groups d)Primary and

    asked by Anonymous
  100. physics

    A town is planning on using the water flowing through a river at a rate of 5.0X10^6 kg/s to carry away the heat from a new power plant. Environmental studies indicate that the temperature of the river should only increase by 0.50ºC. The maximum design

    asked by Dan
  101. physics

    A cylindrical air duct in an air conditioning system has a length of 3.5 m and a radius of 5.00 m. A fan forces air (ç = 1.8 Pa·s) through the duct, such that the air in a room (volume = 242 m3) is replenished every 12 minutes. Determine the difference

    asked by student
  102. algebra

    Please I'm stuck!!!!! A person is driving a car on a straight road. The graph shows the distance in y miles that the individual is from home after x hours. the graph has the following points (1, 40) and (3, 90) Find the slope intercept of the line y =

    asked by Lee
  103. Physics

    Two eagles fly directly toward one another, the first at 13 m/s and the second at 21 m/s. Both screech, the first emitting a frequency of 3200 Hz and the second, a frequency of 3800 Hz. What frequencies do they hear if the speed of sound is 345 m/s? (Tip:

    asked by Cindy
  104. Physics

    Ice (initially at 0 degrees celcius)is added to 0.75 L of tea at 20 degrees celcius to make the coldest possible iced tea. If enough ice is added so the final mixture is all liquid, how much liquid is in the pitcher when this condition occurs?

    asked by Lacey
  105. chemistry........help!! =)

    What is the molarity of ZnCl2 that forms when 30.0g of zinc completely reacts with CuCl2 according to the following reaction? Assume a final volume of 285 mL. Zn(s) + CuCl2(aq)--> ZnCl2(aq) + Cu(s) Please Explain!! Thanks!!

    asked by jenni
  106. physics

    In a tennis serve, a 7.9×10−2 ball can be accelerated from rest to 33 over a distance of 0.80. Find the magnitude of the average force exerted by the racket on the ball during the serve.

    asked by Brandon
  107. physics

    The following tube has dimensions d1=1.16 cm and d2=3.60 mm. Air (density = 1.28 kg/m3) flows through the tube at a rate of 1100.0 cm3/s. Assume that air is an ideal fluid. What is the height h of mercury (density = 13600.0 kg/m3) in the right side of the

    asked by jujubes
  108. Chemistry

    0.500 moles of NOCl is placed in a 1.00L vessel at 700K,and after the system comes to equilibrium,the concentration of the NOCl is .440M. Calculate the value of Kc for the reaction @NOCl(g)->2NO(g)+Cl2(g)?

    asked by Bob
  109. Chemistry

    As one descends group 6A of the periodic table, the number of valence electrons found in each element A. Increases B. Decreases C. Remains the same

    asked by Jerome
  110. Chem

    Please tell me if these are right! 1.How many milliliters of 0.215 M NaOH solution are needed to completely neutralize 2.50 ml of 0.825 M H2SO4 solution? I got 19.2 ml 2. A 10.0-ml sample of vinegar which is an aqueous solution of acetic acid HC2G3O2

    asked by Jessica
  111. Math

    Each capital letter of the alphabet is carefully printed on a piece of paper in block-form and placed in a bowl ABCDEFGHIJKLMNOPQRSTUVWXYZ An individual piece of paper is selected from the bowl. What is the probability that A. the letter is a consonant? B.

    asked by Rena
  112. Precalculus Someone please help

    Evaluate all six trigonometric functions at t, where the given point lies on the terminal side of an angle of t radians in standard position. (40/41, -9/41)

    asked by Josh
  113. 5th Grade Math

    I need help in using the distributive property to rewrite this expression: (7 x 600) + (7 x 400) and then multiply.

    asked by Frankie
  114. chemistry

    If 60 grams of KCl can be dissolved in 100 grams water. Would the remaining solution be unsaturated, saturated, or supersaturated?

    asked by Amanda
  115. College Chemistry

    Given 400.0 g of hot tea at 80.0C, what mass of ice at 0C must bea added to obtain iced tea at 10.0C? The specific heat of water is 4.18 J/(g*C), The specific heat of water is 4.184 kJ/mol.

    asked by Ashley
  116. math(trig)

    1) What's the linear velocity of a point on the tip of a 6-ft propeller turning at 1200 revolutions per min? 2) A gear is driven by a chain that travels 90m/min. Find the radius of the gear if it makes 50 revolutions per minute.

    asked by confused
  117. physics

    A ball is thrown horizontally off the top of a 67 m tall building at a velocity of 7.3 m/s. How far did the ball land from the base of the building? Round your answer to 2 decimal places.

    asked by byung
  118. Chemistry Help Pls!!!

    A 21.18 mL of 0.250 M NaOH is titrated with a H2SO4 solution. The initial volume of H2SO4 was 13.28 and the final volume of H2SO4 was 28.29 mL when the solution turned very slightly pink. What is the concentration of NaOH?

    asked by Jerome
  119. Physics

    A loop-the-loop ride at an amusement park has a radius of 5 m. At the highest point, the rider moves at 8 m/s. At the lowest point the rider moves at 13 m/s. Find what you would feel like you weigh at those points. (This force represents the force of the

    asked by Jennifer
  120. physics

    A boy pulls his little brother in a little red wagon. He keeps the handle horizontal to the ground. His little brother and the wagon weigh 40 kg. How much tension will the boy have to place on the wagon's handle to get it moving from a standstill?

    asked by Jordan
  121. Chemistry

    Which is not a ground state electron configuration? A. 1s2 B. 1s2 2p1 C. 1s2 2s2 D. 1s2 2s2 2p1

    asked by Jerome
  122. Strayer University

    what would you think of a company's ethics if it changed accounting methods every year? what accounting principle would changing methods every year violate? who can be harmed when a company changes its accounting methods too often? How?

    asked by Jimel
  123. Calculus

    Use the Fundamental Theorem of Calculus to find the area of the region bounded by the x-axis and the graph of y = 4 x3 − 4 x. Answer: (1) Use the Fundamental Theorem of Calculus to find the average value of f(x) = e0.9 x between x = 0 and x = 2. Answer:

    asked by Erika
  124. 10th grade

    a 5.0 kg bowling ball is rolling down the lane at 4.0 m/s. what is the kinetic energy of the bowling ball?

    asked by Brianna
  125. science

    Crystal can ride her bike 10 miles in 2.1 hours. What is her velocity?

    asked by Stacy
  126. math

    Andy had 20% fewer marbles than Henry. When Andy gave 80 marbles to Henry, the number of marbles he had left was half of what Henry had. How many marbles did Andy have in the beginning? please help me

    asked by Katherine
  127. College Chemistry

    The eqm. Constant for a reaction is 2.48 at 25°C. what is the value of ΔG° (kJ) at this temperature? (R=8.314 J/k mol)

    asked by Jalisa
  128. chemistry

    Alkali metals react with water to form hydrogen gas and the hydroxide of the metal. When 3.55 grams of an alkali metal reacts with excess water, 1020ml of hydrogen gas, measured at STP, are evolved. What is the alkali metal?

    asked by gina
  129. calculus

    Suppose that log2 = a and log3 = b Solve for x in terms of a and b: 6^x = 10/3 - 6^-x

    asked by Jenny
  130. Stats

    I just need help with starting how to calculate the problem I am so lost. A random sample of eight observations from the first population resulted in a standard deviation of 10. A random sample of six observations from the second population resulted in a

    asked by Yasmin
  131. Calculus

    assume the rate at which the world's oil is being consumed is r = 27 e^0.06 t. Here, just as in your book, r is in billions of barrels per year, t is in years, and t = 0 is January 1, 1990. (a) Fill in the blanks below to express the definite integral

    asked by Jane
  132. science

    If you have 3 liters of air in your lungs and 2/10 of that is oxygen, how many millimeters are in your lungs?

    asked by josh
  133. Chemistry

    What is the Qsp when 59.0 mL of 2.00 multiplied by 10-4 M AgNO3 are mixed with 70.0 mL of 1.00multiplied by10-4 M Na2CrO4? Assume the volumes are additive. Ksp = 1.1 multiplied by 10-12.

    asked by Anonymous
  134. Statistics

    The mean serum cholesterol level in the population of males who do not develop heart disease is known to be 219 mg/100 ml. Suppose you perform a study to investigate whether the mean serum cholesterol levels in males who do develop heart disease is higher

    asked by Mack
  135. geometery

    bases are isosceles triangles with parallel sides that measure 15 centimeters and 25 centimeters. the distance between the parallel sides is 12 centimeters and the length of each of the equal sides is 13 centimeters. the height of the prism is 20

    asked by Anonymous
  136. college chemistry

    the normal freezing point of the element mercury, Hg(l), is a -38.9°C and its molar enthalpy of fusion, ΔHfusion=2.29 KJ/mol. What is the entropy change (J/K) of the system when 50 g of Hg(l) freezes at the normal freezing point. Hg= 200.59 g/mol

    asked by Jamaal
  137. college physics

    A Loop wire has a diameter of 1.00 cm. It carries a current which generates a magnetic field of 3.00 MT at the center of the loop. What is the current in the loop?

    asked by Digen Dawor
  138. Chemistry

    Which of the following molecules are linear? BF3 HN3 COS NH3 O3 SiF4 AsH3 SO2 C2H2 PF3 CF4 H2O SO3 HCN N2O H2S CS2 After drawing out all the lewis structures, and using VSPER theory, I found: COS, C2H2, CS2, HCN to be linear. Am I right/missing any?

    asked by Jon
  139. Calc

    Use the derivative to determine whether the function is strictly monotonic on its entire domain and therefore has an inverse function. f(x) = cos [(3x)/2]

    asked by Erica
  140. math

    the difference between the prices of two bikes is $18.the sum of the prices is $258.how much does each bike cost?

    asked by julian
  141. Chemistry

    Calculate the energy changes associated with each of the following reactions. Label each as endothermic or exothermic. A.) 2(C2H2)+5(O2)------->4(CO2)+2(H2O) B.) N2+O2------>2(NO) C.) NH3+H2O----->NH4OH D.) 2(BrCl)----->Br2+Cl2

    asked by Jake
  142. Math

    I am stuck on a problem that has to do with the double angle formulas. I have to solve this: 4sinxcosx = 1. I tried using the formula 2sinu = 2sinucosu by substituting it in like this: 2(2sinxcosx)= 1 but then I am stuck

    asked by kathleen
  143. college chemistry

    How many grams of Mg(OH)2 can be prepared from the reaction of 20.0g of Mg3N2 with 10.0g of H2O?

    asked by Cami
  144. ethics

    What type of situation would personal or religious beliefs conflict with something that may be asked of you professionally? What should one do in this situation?

    asked by Anonymous
  145. math

    what is the ascending order of 8+7x^2-12x^3-4x^3y

    asked by bob
  146. Chemistry

    is this right Consider the following reaction at equilibrium N2(g) + O2(g) + heat < = > 2NO(g) Indicate how each of the following will shift the equilibrium a. raising the temperature of the reaction. b. decreasing the volume of the reaction container. c.

    asked by Jason
  147. Algebra

    The side of a square equals the length of a rectangle. The width of the rectangle is 4 meters longer than its length. The sum of the areas of the square and the rectangle is 48 square centimeters. Find the side of the square

    asked by Scott
  148. physics

    A fresh water pond that is 14.7 m deep is contained on one side by a cliff. The water has eroded a nearly horizontal "tube" through a bed of limestone, which allows the water to emerge on the other side of the cliff. If the "tube" has a diameter of 4.07

    asked by jujubes
  149. Physics

    There is a 1.2 m distance between a crest and an adjacent trough in a series of waves on the surface of a lake. In 30s, 35 crests pass a buoy anchored in the lake. What is the speed of these waves?

    asked by Lily
  150. MATH

    A dog-food company makes a special kind of dog food. It consists of 30% meat powder and 70% grain. The meat powder costs 90 cents per pound. The grain costs 60 cents per pound. What is the cost of the raw materials per pound of dog food

    asked by JESSICA
  151. Chem

    Please tell me if these are right. 1.According to Le Chatelier’s principle, what is the effect on the products when N2 is added to the equilibrium mixture of each of the following reactions? a. 2NH3(g) < = > 3H2(g) + N2(g) B. N2(g) + O2(g) 2NO(g) C.

    asked by Carrie
  152. Physics

    For a scene in a movie, a stunt driver drives a 1.90 103 kg pickup truck with a length of 4.09 m around a circular curve with a radius of curvature of 0.333 km (Fig. 7.29). The truck is to curve off the road, jump across a gully 10.0 m wide, and land on

    asked by Sandi
  153. math

    At an election there were two candidates.George and Solomon.In that constituency there were.75,000 registered voters 80% of them cast their votes.55%of voters cast their votes to George and the rest voted for Solomon.By how many votes did George win over

    asked by Muna Abdallah
  154. Chemistry

    What is the concentration of a HCl solution if 20.0 mL of the solution is neutralized by 15.0 mL of a 0.10 M Ca(OH)2 solution?

    asked by Ivy
  155. math

    terry wants to buy one pair of moccasins.she can choose from some that cost $22.50,$27.00,$20.95,and $24.75.how much will terry save if she buys the least expensive instead of the most expensive pair?

    asked by julian
  156. Purdue

    Factor or can it be factored 64s^3+729x^3

    asked by Devan
  157. 5th grade

    Jen and Heather went to lunch. When the bill came, Jen discovered that she only had $8. Heather had enough money to pay the other part, or 3/5 of the bill. How much was the total bill?

    asked by Oliver
  158. math

    Mrs.penn has a circular tablecloth with a circumference of 29 feet. Which expression could be used ro find the radius of the tablecloth? f. 29 - 2 pie g. 29/2 pie h. 29/pie j 29 + 2pie

    asked by dylan
  159. math

    franklin school has 3 boys for every four girls in the fifth grade. there are 140 students in the fifth grade. a.how many are boys? b.how many are girls?

    asked by cindy
  160. Physics

    There is a 1.2 m distance between a crest and an adjacent trough in a series of waves on the surface of a lake. In 30s, 35 crests pass a buoy anchored in the lake. What is the speed of these waves?

    asked by Lily
  161. college physics

    One cm of a 10-cm-long rod is made of metal, and the rest is wood. The metal has a density of 5000kg/m^3 and the wood has a density of 500kg/m^3. When the rod is set into pure water, the metal part points downward. How much of the rod is underwater?

    asked by jessica
  162. Trigonometry

    Minimum force required to prevent a ball weighing 29.6 pounds from rolling down a ramp which is inclined 14.9 degrees with the horizon?

    asked by Casey Lewis
  163. math

    the professinal base ball is 162 games.a player was at bat 3 times in each game, and he played 2/3 of the game. a.how many times was the player at bat during the season? b.the player hit o.250., which means he got a hit 25%of the time , or once in every

    asked by cindy
  164. Marketing

    22) A ______________ is an organized way of continually gathering and analyzing data to get information to help marketing managers make ongoing decisions.

    asked by sherree
  165. physics

    A full can of black cherry soda has a mass of 0.406 kg. It contains 3.38 m3 of liquid. Assuming that the soda has the same density as water, find the volume of aluminum used to make the can.

    asked by joe
  166. math

    Simplify sin^2x+cos^2x+sec^2x -tan^2x+csc^2x-cot^2x

    asked by carol
  167. math

    how do you arrange these numbers to make this equation true 7,26,46,15 to =160 Please help.....

    asked by deb
  168. Calc

    Show that f is strictly monotonic on the given interval and therefore has an inverse function on that interval. f(x) = abs. val. (x + 2), [-2, infinity)

    asked by Brandon
  169. Grammar

    Diagram each sampile subject and simple predicate. 1. People arrived early. People/arrived 2.They started the machines. They/started 3. Other people were stading around. people/standing 4. Four women have arrived late. women/arrived 5. Most factories are

    asked by TiffanyJ
  170. math

    if you have a apple juice mix of 5 cups concentrate to 8 cups water, if you only make 1 cup of mix, how much water and how much concentrate do you need?

    asked by Jack
  171. Math

    Consider the equation below. (Round the answers to three decimal places. If you need to use -infinity or infinity, enter -INFINITY or INFINITY.) f(x) = 9 sqrt(xe*^(-x) (a) Find the interval on which f is increasing. ( , ) Find the interval on which f is

    asked by Mike
  172. MATH

    Allen started out with x marbles. He doubled his number of marbles by buying an additional x marbles from Betty. Then he gave away one-third of all his marbles to his friend Clarence. At the end of the day, he had 16 marbles. How many marbles did he start

    asked by JESSICA
  173. algebra

    3h=15

    asked by gabby
  174. College Chemistry

    The eqm. Constant for a reaction is 2.48 at 25°C. what is the value of ΔG° (kJ) at this temperature? (R=8.314 J/k mol)

    asked by Shanice
  175. spanish

    I am preparing for my oral exam (spanish 1) and i wrote all this down, can any one check my grammar, conjugations and add-on if necessary And also would this last me 3 minutes or should i write more to each question?? Theme 1 (Las vacaciones) ¿Adónde

    asked by lauren
  176. English 2

    In “Civil Peace” Jonathan, the main character has a positive outlook on life despite his situation. Explain what is going on around Jonathan and how he is dealing with his difficult situation. Use text support from the story please.

    asked by Sha'Queshia
  177. college Chemistry

    A 21.18 mL of 0.250 M NaOH is titrated with a H2SO4 solution. The initial volume of H2SO4 was 13.28 and the final volume of H2SO4 was 28.29 mL when the solution turned very slightly pink. What is the concentration of NaOH?

    asked by Ivy
  178. Chemistry

    40 years ago, the first time a vehicle was driven over an extraterrestrial surface. The Soviet Lunokhod (moon walker) rover covered several miles on the moon, heated at night by a polonium-210 source, which undergoes an alpha decay to lead (Pb) yielding

    asked by Eddie
  179. Physics

    Physics Question Finally, your friend's twin engine jet airplane lands. As it stands on the runway, you hear the sound of the engines getting louder and softer, rhythmically once every 2.3 s. The average frequency you hear is 3650 Hz. What are the

    asked by CollegeKid
  180. chemistry

    The solubility of an ionic compound is 30 grams of compound in 100 mililiters of water. If 60 grams of the compound is dissolved in 200 mL of water, the solution will saturated. t/f

    asked by stella
  181. chem

    how many moles of H2O will be produced from the complete combustion of 2.00g of CH4?

    asked by c1220
  182. creative activities in other curriculum areas

    which one of the following methods is preferred for teaching songs from recordings to young children? a-the phrase-wise method b-the whole-song method c-the combination method d-the strong-melody method

    asked by nikki
  183. chem

    how would you find the answer? A carbon nucleus has six protons and six neutrons. How many electrons would it take to equal the mass of a carbon nucleus?

    asked by hannah
  184. Chemistry

    For following problems 1 to 5, classify the bonds as: a) non-polar covalent b) polar covalent c) ionic d) metallic e) super covalent 1.) O-Cl 2.) Li-Br 3.) N-N 4.) N-H 5.) C-S

    asked by Jay
  185. Chemistry

    You take 2 liters of water at 20 degrees Celsius and remove heat at 200W from it for 5 min. What is the temperature and state of the water after the experiment? Some properties of water: Heat of fusion: 333.55 kJ/kg, Heat of vaporization: 2257 kJ/kg, Heat

    asked by Eddie
  186. human development 11 edition

    Menopausal syndrome may be related to personal characteristics or past experiences?

    asked by sandi
  187. math

    If I am 11 years old on Earth,how old will I be in Mercury?

    asked by aglay
  188. Chemistry

    How many grams of sodium carbonate must be added to 2.50 kg of water in order to lower the freezing point of the resulting solution to 258 Kelvin?

    asked by sfs
  189. Chemistry

    Calculate the molarity of a 5.4% sodium hydroxide solution whose density is 1.07 g/mL.

    asked by anaymous
  190. 4th grade

    my teacher gave me this question I don't get it. If a normal person blinks 25 times per minute how old would you be your next birthday?

    asked by Anonymous
  191. MATH HELP!!

    Ashley and Nick worked on a math project together. Ashley finished 1/6 of the project and Nick finished 2/8 of the project. How much more of the project is left? A: 3/4 B: 7/12 C: 5/6 D: 7/24 My answer: I think it's 7/12 but i'm not sure.

    asked by Arushi
  192. 5 th grade math

    what is the mean for the following number? 40,60,55,45,100 ?______ what is the lest Common Multiple (LCM)for 6 and 12 ?_______ please! help me i got stuck with this today!! thank you.

    asked by pat
  193. college physics

    One cm of a 10-cm-long rod is made of metal, and the rest is wood. The metal has a density of 5000kg/m^3 and the wood has a density of 500kg/m^3. When the rod is set into pure water, the metal part points downward. How much of the rod is underwater?

    asked by jessica
  194. math

    the bag has 6 marbles in it. each marable is either red,blue,or green. what is the least number of marables that ou must pull out of the bag to be sure you have 2 marble the same color?

    asked by cindy
  195. algebra

    Someone please help me not sure if I even know what I am doing with any of this. write the following ratios in simplest form 5 3/5 to 2 1/10 5 3/5 2 1/10 x 100/100 = 8/20 = 2/5 the ratio of 7 dimes to 3 quarters 7/3 x 100/100 = 700/300 = 175/75 solve the

    asked by TANGIE
  196. Marketing

    Clustering techniques applied to segmenting markets

    asked by sherree
  197. Chemistry

    What is the boiling point of a solution made using 731g of sucrose, C12H22O11, in 0.250kg of water,h2o ?

    asked by Garrett
  198. algebra 2

    27x^3-8=0 (difference of two cubes)

    asked by Melanie
  199. PHL/323

    WHAT ARE SOME BLURBS FOR SCOTTS PAPER COMPANY? PLEASE PLEASE HELP IM ALMOST DONE AND THIS IS CONFUSING ME

    asked by HELP IM STUCK!!! ITS DUE TONIGHT
  200. english

    What are some red flags that indicate you should avoid a particular source?

    asked by mary
  201. 12th grade

    Firm A offer 40,000 salary with $2,000 increase evey year. FIRM B offer 38,500 salary with 5% increse every year. After how many year he will make same money?

    asked by d
  202. Chemistry

    A solid sample containing a simple mixture of NaHSO3 and Na2SO3 was dissolved in distilled water and titrated with a standard HCl solution. 13.88 mL was required to reach the first stoichiometric point, and an additional 45.12 mL to reach the second. What

    asked by Silver
  203. 5th grade

    the wright brothers had two flights on that fanmous day at kitty hawk. orville flew 120 ft.and 585 ft. wilbar flew 340 ft. and 852 ft. what was the average distance flown that day? at that rate , how many flights would it taken them to fly a mile? [rounded

    asked by cindy
  204. Spanish

    11. Mama, estos jeans no cuestan mucho; son muy ________. a. caros b. menos c. baratos d. cariñosos B 12. "¿_______ por esa camisa?" a. "No pagué mucho. b. Cuánto pagaste c. Pagué cien dólares d. Dónde pagaste B? 13. Lo compraste en una tienda de

    asked by mysterychicken
  205. Physics Light and Color

    Suppose that you close one eye, and see two objects, C and D. As you move your head toward the right, C appears to move toward the left compared to D. Which object is closer? Explain.

    asked by Amanda
  206. physic

    An object has a kinetic energy of 329 J and a momentum of magnitude 22.3 kg·m/s.

    asked by sabi
  207. Chemistry

    Does HCl form a precipitate with NaClO?

    asked by Ann
  208. chemistry

    What is the solubility in moles/liter for copper(I) chloride at 25 oC given a Ksp value of 1 x 10-6

    asked by helen
  209. math

    Use an inequality to solve the problem. Be sure to show the inequality and all of your work. A car rental company has two rental rates. Rate 1 is $63 per day plus $0.18 per mile. Rate 2 is $126 per day plus $0.09 per mile. If you plan to rent for one week,

    asked by Kay
  210. art

    u c i really want to know everything about fashion becasue i'm workng on a fashion book and i need some ideas so can u give some fashion websites about fashion and some ideas PLEASE !!!!

    asked by Gen
  211. Chemistry

    Please write the chemical equation and calculate the reaction enthalpy (or energy) for the total chlorination (addition of chlorine gas to all double bonds) of cyclopentadiene (if you do not know what cyclopentadiene is, assume C2H4).

    asked by Eddie
  212. Physics

    if a ball is thrown vertically into the air, leaving the ground at a height of 1.8m, with a speed of 9.7m s -1. When it rises and falls to the ground what will the balls speed be as it hits the ground? please help with an explanation as i am so stuck, my

    asked by Rebecca Niles
  213. Physics

    A roller-coster car starts from rest at the top of a 16 meter hight track, and slides without friction through a 6 meter tall loop. Find the speed of the car at the bottom of the loop. find the speed of the car when it's upside down at the top of the loop

    asked by djspidal
  214. Chemistry

    Consider trying to dissolve both calcium chloride in aqueous solution. a. Predict which salt is more soluble and write its formula. b. Explain your prediction in part a above by qualitatively comparing the bonding and solvation energies for the two salts.

    asked by anaymous
  215. physics

    Suppose that water waves coming into a dock have a velocity of 1.0 m/s and a wavelength of 2.2 m. With what frequency do these waves meet the dock?

    asked by judy
  216. Readin poetry

    A slash of blue, a sweep of gray, some scarlet patches on the way, compose an evening sky A little purple -slipped between-some ruby trousers hurried on a wave of gold a bank of day this just makes out the morning sky Question, the poet compares the sky to

    asked by John`
  217. English

    Thank you for your corrections.Can you please check these sentences, please? 1)I live in a little town in south-western Piedmont, famous for its roman history and its excellent wines. 2)It is situated 200 miles above sea level and is surrounded by a hilly

    asked by Franco
  218. English

    Can you please check these sentences? Thank you. 1) Fishing was an important source of income in the Maldives. Now it has been replaced by tourism. 2) In Dublin you can go shopping in the busy and noisy streets around Grafton Street. 3) In 1845 Ireland was

    asked by Franco
  219. read and write

    what part of speech is bench in this sentence? Fred gave the player on the opponents'bench the game ball.

    asked by hunter
  220. economics

    what does the term utilty mean and how does it relate to purposeful behavior

    asked by christy
  221. physics

    A source of sound (1200 Hz) emits uniformly in all directions. An observer 2.99 m from the source measures a sound level of 41.1 dB. Calculate the average power output of the source.

    asked by Madeline
  222. physics

    A source of sound (1200 Hz) emits uniformly in all directions. An observer 2.99 m from the source measures a sound level of 41.1 dB. Calculate the average power output of the source.

    asked by Madeline
  223. English

    1. You will have another cake. (Does 'have' mean 'eat'?) 2. It's a lovely day. (What does 'lovely' mean? What other similar expressions can we use instead of 'lovely'?)

    asked by rfvv
  224. Math

    Rectangular plate is 6m wide and 12m long two holes of 2diameter have been gay cut in plate calculate the are of remaining plat?

    asked by Deepak
  225. college chemistry

    what is the volume (in mL) when 280 mL of an ideal gas at 87 degree C and 650 torr preasure is cooled at 27 degree C at 760 torr?

    asked by Cami
  226. college chemistry

    a 20.3 sample of an organic compound was ground with 442 mg of camphor to form an intimate mixture melting at 170.3 degree C. What is the apparent formula weight of the organic compound ? (Kf of camphor=37.7 degree C/m M.P. of camphor= 178.4 degree C)

    asked by Cami
  227. Math

    Which fraction also belongs in set a? set - 3/24, 5/40, 9/72, 6/48 a. 4/24 b. 2/8 c.4/32 d. 8/40

    asked by Jason
  228. PHYSICS: Waves in Media

    An organ pipe is open at one end and has a length of 3 m. What is its fundamental frequency if the speed of sound is 336 m/s?

    asked by Ashley
  229. Math!! Help plzz

    Multiplying decimals by 3 digit decimals and i don't gget it on example: 34.56 x0.40 _______ ?????

    asked by Cristal
  230. L'hospital rule

    Evaluate the limit. lim (cos(x))^(7/x^2) as x goes x-->0^+

    asked by mike
  231. forth grade math

    if less than half of a garden is planted with corn is it reasonable to estimat that 2 thirds of the garden is planted with corn?

    asked by sharnae
  232. Chemistry

    As one descends group 6A of the periodic table, the number of valence electrons found in each element A. Increases B. Decreases C. Remains the same

    asked by Jay
  233. ethics

    What is the impact of geography on business practices and the global economy. What are some examples?

    asked by Anonymous
  234. Chemistry

    Calculate the freezing point of each of the solution 75.0 of glucose,C6H12O6 , added to 9.30×10−2 of water.... Please help

    asked by Garrett
  235. writing paper for political science

    Confused on what do to do for this paper I have to write for a class here in a community college. I am to choose a country in asia, africa or Latin America like say South Korea. I am to research recent history and contemporary situation. Identify and

    asked by Alan
  236. math

    what is 179 diveded by 4 what is the remainder and whats the work you have to show

    asked by olive
  237. Organic Chemistry

    Hello, I just have a quick question that I would like to have clarified. According to my textbook definition, NaBH4 (a reducing agent) can be used in solution in alcohols or even solution in water - provided the solution is alkaline." However, my textbook,

    asked by Toki
  238. chemistry

    What is the formula for the compound formed when potassium reacts with nitrogen?

    asked by bob
  239. chemistry

    If 40 mL of a 6 {\rm M} \;{\rm NaOH} solution is diluted to a final volume of 200 mL, what is the resulting concentration of the solution?

    asked by warla
  240. physics

    okay the question i got was asking the lengths of the first, second, and third waves of a standing wave, of a string that is fixed at both ends. the strings length is 2.38 meters. Ive already figured out the three lengths, being 4.76, 2.38, and then 1.59.

    asked by Matt
  241. Physics

    The displacement from the equilibrium caused by a wave on a string is given by: y(x,t) = (-0.00200 m)sin[(40m^-1)x-(800s^-1)t]. What is the number of waves in 1 m?

    asked by Dan
  242. Math

    I'm not sure how to do this question. Consider the experiments involving rolling a single die once. Give the probabilities of the event described. What is P (even or prime)?

    asked by Rena
  243. US

    I really need HELP!!! can someone please give me a cite. Document a chronology of events beginning with the union's call for a strike.

    asked by Attalah
  244. Europe

    What role did the geography of europe play in the development of and ways of life in these towns?

    asked by Stephanie
  245. math

    how to find surface area for a triangular pyramid? with the length of 6 and 7cm with a missing third side and the slant height of 12cm

    asked by Anonymous
  246. french

    what does casa la salle mean in english?

    asked by Anonymous
  247. grammar

    My teacher corrected a sentence, but wants me to explain why she is correct. I wrote: "Franklin acknowledges how difficult achieving perfection is, and how many have failed at it just like him." She corrected it to read: "Franklin acknowledges how

    asked by Leslie
  248. math

    Write at least two equivalent fractions for each whole number Can I do this with the number zero?

    asked by CJ
  249. Com170

    • Then, on the same document, write a one paragraph analysis of about 150 words, in which you do the following: o Identify which of the two selected paragraphs was more effective, focusing on the writing elements rather than the opinions presented. o

    asked by Nicole
  250. PHYSICS

    An automobile of mass 1200kg accelerates from rest to a speed of 20.0m/s in 12.0 seconds. What is the magnitude of the net force acting on the auto?

    asked by Cassie
  251. chemistry

    if you combust 30kg of octane (about the amount in one tank for a small car), how many kilograms of CO2 will you emit?

    asked by emily
  252. human development 11th edition

    Why is there a brief mention of religion in the life of elderly facing death? Is it bias?

    asked by sandi
  253. Evaluating limits

    Evaluate the limit. (If you need to use - or , enter -INFINITY or INFINITY.) lim x +sin(x)/(2x+cos(x)) as x goes to 0.

    asked by mike
  254. math

    A ball is dropped from a height of 5 ft. Assuming that on each bounce the ball rebounds to one-third of its previous height, find the total distance travelled by the ball.

    asked by Mike
  255. English

    Correct the following run-on sentences and/or comma splices..... 1. My part-time job is excellent, it pays well, provides good experience, and offers a real challenge.

    asked by Lynsie
  256. English

    Correct the following run-on sentences and/or comma splices.... Beyond the forests are steep cliffs, at the bottom of the cliffs are huge, moss-covered boulders.

    asked by Lynsie
  257. economics

    What is the impact of geography on business practices and the global economy. What are some examples?

    asked by Anonymous
  258. us history

    I need help finding information about the Industrial revolution. How it impacted American society economically, socially, politically, and morally. This needs to be a 500 word essay. Thanks for the help! :)

    asked by Abby
  259. college

    A tank of water 3 meters deep sits on a table 1 meter tall. A hole is located 2 meters from the bottom of the tank. Water flows out of the hole and strikes the ground. Where does it strike the ground? Assume incompressible, non viscous flow.

    asked by Jib
  260. algebra

    1) 27x^3+8 2) 3x^2-x-4

    asked by mike
  261. earth

    What does the word anti mean? My answer- is opposed to something????? Please help me

    asked by Dave
  262. Math

    how do you conduct a five step hypothesis testing?

    asked by Anonymous
  263. physics

    A 0.29 \mu F and a 0.70 \mu F capacitor are connected in series to a 15 V battery.

    asked by دلال
  264. 5th grade

    Ginny has a pumpkin with a mass of 4.8kilograms. If .9 of its mass is water, how much of its mass is water? How much is not water?

    asked by Marcus
  265. Physics

    A spring stretches 4.3 cm when a 13 g object is hung from it. The object is replaced with a block of mass 22 g that oscillates in simple harmonic motion, calculate the period of motion.

    asked by Anonymous
  266. Math

    The sum of two numbers is 44. The second number is 5 more than twice the first. Find the numbers. x+y=44 2x+5y Is this correct? So the answer would be 3x + 6y=44?

    asked by Julie JAM
  267. 7th grade

    is y=x/7 a direct variation????

    asked by Cristina
  268. Spanish

    6. Necesito una chaqueta y sólo tengo diez dólares. Voy _________. a. al almacén que tiene ropa cara b. a la zapatería con mis abuelos c. a una tienda da descuentos d. a comprar un suéter C 7. "Isabel, ¿quires llevar esta falda?" "No, no _______

    asked by mysterychicken
  269. Math

    Draw a figure tto represent the root of 81 could I just put 81 dots and say 9 x 9 = 81

    asked by Dally
  270. Spanish

    Voy a la piscina means I'm going to the pool, correct? Would I say I'm going to the mail as Voy al correo. How do I say I need to send a card? Thank you

    asked by Anna
  271. Trigonometry

    r = 1/32 v^2 sin 2 beta v is the initial velocity and beta is the angle of elevation. r = 35000 feet v = 3200 feet per second. What is the angle?

    asked by Casey Lewis
  272. Organic Chemistry

    I just finished an organic chemistry lab experiment on separating and analyzing an unknown acid/neutral compound mixture using extraction, recrystallization, TLC, melting point analysis, and IR spectrum. In the instructions, "Obtain an IR spectrum for each

    asked by Kate
  273. Chemistry

    Before 1962,dimes minted in the US contained the precious metal silver.A 2.08 gram dime is dissolved in nitric acid and reacted with saturated sodium chloride solution. This process precipitates all the silver in the dime as 342mg of AgCl(s). How many

    asked by D
  274. English

    Hello.Will you please help me with a few problems? 1)Which is correct "Germany's 10,000 citizens" or "10,000 of Germany's citizens" or "10,000 Germany's citizens"? 2)Is it possible to say "the visit aspires to (improve)"? 3)Does it sound natural to say

    asked by Ilma
  275. Chemistry

    Which is not a ground state electron configuration? A. 1s2 B. 1s2 2p1 C. 1s2 2s2 D. 1s2 2s2 2p1

    asked by Jay
  276. Math.

    Create a "magic" square (4 columns wide x 4 rows deep) using the 12 through 27. The sum of each column should be 78, each row should be 78 and the diagonals as well.

    asked by Unknown.
  277. Calc

    Find the inverse of f(x) = (x+2)/x

    asked by Erica
  278. statistics

    For a binomial distribution, the data collected are the result of counts

    asked by Anonymous
  279. 11th grade

    How much electricity is needed to produce 120g of Calcium metal from molten CaCl2.

    asked by Rhonda
  280. chem

    can you explain? For each of the reactions shown, calculate how many grams of the product form when 16.8 g of the reactant in bold completely reacts. Assume that there is more than enough of the other reactant. 4 Cr(s) + 3 O2(g) 2 Cr2O3(s) thanks

    asked by hannah
  281. physics

    okay the question i got was asking the lengths of the first, second, and third waves of a standing wave, of a string that is fixed at both ends. the strings length is 2.38 meters. Ive already figured out the three lengths, being 4.76, 2.38, and then 1.59.

    asked by Matt
  282. college Chemistry

    As one descends group 6A of the periodic table, the number of valence electrons found in each element? A. Increases B. Decreases C. Remains the same

    asked by Ivy
  283. college physics

    Rather than rotate completely horizontally, a carousel rotates at an angle of 10° from horizontal, with a constant angular velocity of 1.571 RAD/s. A box is placed 1.5 m from the axis of rotation. What’s the minimum coefficient of static friction so the

    asked by jessica
  284. Precalculus Help

    State whether or not the equation is an identity. Prove your statement. sin(x)/cos(x)+ cos(x)/1+sin(x)=sec(x)

    asked by Anonymous
  285. MATH

    Max’s credit card charges him 1.575% interest per month on his average daily balance in that month. Max’s average daily balance for January is $810. What is the interest that he will pay for January

    asked by JESSICA
  286. physics (easy)

    Will a 7.25 kg ball with a diamter of 22 cm float in water? I know that the radius is 11 cm and that the density of water is 1000kg/m^3 and I got that it will float but it just doesn't sound right. Could anyone help please?

    asked by Alona
  287. algebra

    I'm doing functions, and I don't know how I'm solving this equation wrong? the equation is y = (x-2)^2 - 1 when I graph it, the shape is supposed to be a parabola. I'm using -2,-1,0,1, and 2 as my X values. But I'm getting 15, 8, 3, 0, and -1 for my Y

    asked by Michelle
  288. social studies

    If you from Iran,what do you like and don't like about america? Also why you decided to come to america?

    asked by john
  289. algebra

    How do I solve for x on both sides of the equation, i.e. 72x+48=42x-12? Is there a standard way of figuring this out?

    asked by Lost
  290. Anatomy

    The gland that helps regulate the endocrine system by secreting stimulating hormones is the____. Thanks for helping!

    asked by Anna
  291. English

    The problem is my thesis statement. That is the step I am stuck on.

    asked by Kyle
  292. HSM/220

    You are the executive director of an established not-for-profit, community-based organization provider that offers high-quality educational, vocational, and training services to various segments of the local population. In response to the increasing

    asked by Angela
  293. science

    what is the condensed structure for the reactants and products of the following: cis-2-chloro-2-butene + HI-----> ??

    asked by jazzy
  294. geometry

    The coordinates are a(0,2) b(12,0) and c(-6,0). If cm is a median, find the coordinates of m.

    asked by Gia
  295. math

    find each sum 65+18 How can you regroup ones in this sum?

    asked by esha
  296. Marketing

    20) The process of naming broad product-markets and then segmenting them in order to select target markets and develop suitable marketing mixes is called:

    asked by sherree
  297. finance

    If we invest money for 10 years at 8% interest, compounded semi-annually, we are really investing money for ______ six month periods, during which we receive _______ percent interest each year.

    asked by TAMMY
  298. College math

    Analyze x²-6x-5y=1. Determine the vertex, focus, directrix, intercepts, axis of symmetry, and at least 2 other points on the graph.

    asked by Angel
  299. college

    suppose that you have 800ft of fencing. you are to construct a rectangular corral which is divided into two pieces. what are the dimensions that give the largest possible areas?

    asked by tanika
  300. History

    How does economic growth occur according to free market capitalist?

    asked by Lola
  301. algebra

    Add. 5x^2-8x^3+3x-2 and 4x^3+5x^2+9-x

    asked by mike
  302. Prime Factorization

    What is the prime factorization of 1,521? Please show work. Thanks!!

    asked by Thanks to all Jiskha Teachers
  303. math

    how do you arrange these following numbers to make this equation true 18,9,24,20 and to =18 please help....

    asked by deb
  304. math

    what is the 50 term of the arithmetic which begins with 20 is 105? what is the common difference?

    asked by john
  305. Grammar

    5. Most factories are busy. Factories/are busy 9. People are watching a show. People/are watching

    asked by TiffanyJ
  306. HELP

    What do you think is the most powerful statement of the Narrative Lif Of fredrick Douglass?

    asked by Lola
  307. 10th grade

    What influences did the colonies have on the imperialist nation

    asked by cheyenne
  308. 10th grade

    I am having a hard time starting my paper on Life of Pi by Yann Martel. My thesis is: If Richard Parker is Pi Patel then Pi is God. I don't know how to begin.

    asked by Kyle
  309. english

    hey its me again... i think i need to reword my issue. i am having trouble clearing up my thesis. I feel like i have the idea but it doesnt set me up to write an organised paper. the idea being that if Richard is God and Richard and Pi are one then Pi is

    asked by Kyle
  310. math

    Andy had 20% fewer marbles than Henry. When Andy gave 80 marbles to Henry, the number of marbles he had left was half of what Henry had. How many marbles did Andy have in the beginning? please help me

    asked by Katherine
  311. chemistry

    PH3 has a mass of 17.33 grams, what is the mass in grams of H2 produced? 4 PH3 -> P4 + 6 H2

    asked by jamie
  312. college calculus-initial value

    dy/dx=cos(7x)+5/pi initial condition y(pi/4)=2

    asked by eileen
  313. psychology

    language structure is important in cognition, but is it really? For example, if a child said to you, "You, me, cookie, go now, hurry," you would know what the child meant even thought it is not grammatically correct, how is that possible? Please note that

    asked by missy
  314. 4th grade science

    Where on a glacier are oraines found?

    asked by Anonymous
  315. Math

    Luke bought some thing at the store. He paid $5.98 for a pizza, $3.75 for a case of soda $2.50 for a box of brownie mix and $1.01 in sales tax. What information is needed to find Lukes correct change?

    asked by Jason
  316. Math

    Maratha bakes between 4 1/4 and 9 3/4 hours each day at her bakery. About how many hours does she spend baking in one week?

    asked by Please Help!
  317. Math

    3[x + 2 (x + 1)^2 - 4x] What would you do first to simplify? What would you do second to simplify?

    asked by Dillard
  318. science

    what is the condensed structures for the reactants and products for 2,3-dimethly-1-butene + water (with acid catalyst)--------> ??

    asked by jazzy
  319. adv. alg.

    -i squared square root of -80

    asked by michelle
  320. math

    if the employee is fulltime at $9.50hr (plus 20% for benefits) and works one hour of overtime at 1.5 salary, what would the cost be for one week?

    asked by Rey
  321. 4th grade

    At a school fair, you can toss coins into cups to earn points. If you earn 100 points or more you win a prize. The cups are worth 15, 20, 25, and 30 points. If you get 4 tosses and can stop whenever you reach 100 points, what are all the possible

    asked by Anonymous
  322. business comunication

    write an application in response to an advertisement in the daily dawn for the post of manager hrm in sony electric lahore

    asked by ali
  323. Math

    Prime factorization of 12*x2*z2(exponents) Please show work. Thanks!

    asked by Thanks to all Jiskha Teachers
  324. English

    What is the Greastest injustice of slavery according to douglass?

    asked by Kyle
  325. math

    If a normal studentblinks 25 times per minute how old yould you be your next birthday?

    asked by mike
  326. uc

    As an experiment she randomly selected 15 students and randomly assigned them to one of three groups which include either a PowerPoint presentation created by the faculty, AuthorGen Presentation created by the faculty, or a well known tutorial by the ABC

    asked by tia
  327. math

    find the fourth term of the geometric sequence whose first is 200 and common ratio is 7/2

    asked by john
  328. math

    writing expressions in algebra story problems

    asked by Anonymous
  329. World Studies

    Definition of pyramid please

    asked by Thanks to all Jiskha Teachers
  330. Chemistry

    What kind of pressure would be exerted by 5 moles of water vapor if it were contained in a 0.5 liter bottle heated to 1000K?

    asked by Linda
  331. English

    help to unscramble-tangou

    asked by Glenda
  332. Chemistry

    Before 1962,dimes minted in the US contained the precious metal silver.A 2.08 gram dime is dissolved in nitric acid and reacted with saturated sodium chloride solution. This process precipitates all the silver in the dime as 342mg of AgCl(s). How many

    asked by D
  333. writing

    use the word girls in a sentence

    asked by sha
  334. MATh

    Faith earned 1/3 of her allowance from washing the dishes and 1/6 of her allowance from cleaning her room. How much of Faith $36 allowance was not earned from washing the dishes or cleaning room?

    asked by Dobby
  335. Math

    How many terms will you have if (x+5)^5 is expanded?

    asked by Anonymous
  336. ethics

    should the European culture of drinking wine should be allowed even in the workplace? Should businesses allow their european employees to drink with lunch for example? Why or why not?

    asked by Anonymous
  337. science

    which of the following best transmits light? a. pair of eyeglasses b. black construction paper c. a wooden door d. a concrete wall

    asked by daphne
  338. PLZ look at Chemistry Questions!!!

    No chemistry questions are getting answered =(

    asked by Chemistry!
  339. Chemistry

    How much calcium chloride would you need to dissolve in 500 grams of water to create a solution whose boiling point is 100.40 C?

    asked by anaymous
  340. Algebra

    Does x-3 represent a function?

    asked by Helene
  341. :)

    Which white person discussed or mentioned in Narrative Life is most important?

    asked by Mathew
  342. 12U Physics

    An object is moving down a ramp that has mu=0.150. It initially starts at (0,1), and the bottom of the ramp is at (sqrt(3),0) Show that the parametric down the ramp are given by: ht tp://img819.imageshack.us/img819/5993/screenhunter03dec061758.gif I know

    asked by Matt
  343. Math

    Pat throws her loose change into a can on her desk. When she took it out, there were only quarters and nickels. There were a total of 65 coins. If she had a total of $13.65, find the number of quarters and nickels.

    asked by Julie JAM
  344. Chemistry

    How many moles of CO2 would be contained in a cylinder the size of a pop can (355 ml) at a temperature of 300K and 10 atm? How much would that weigh?

    asked by Grace
  345. Math

    12y^2+16-13 I cant seem to get the right answer please help

    asked by mike
  346. math

    how to convert 1.37 kg as a mixed number

    asked by nini
  347. Science

    Should humans strive to preserve a representative sample of all biomes or aquatic zones?

    asked by Aim
  348. Math

    Luke bought some things at the store. He paid $5.98 for a pizza, $3.75 for a case of dr.pepper, $2.50 for a box of brownie mix. And $1.01 in sales tax. What information is needed to find Lukes correct change?

    asked by Please Help!
  349. college calculus-initial value

    dy/dx=cos(7x)+5/pi initial condition y(pi/4)=2

    asked by eileen
  350. math

    -4+A+B=

    asked by jesse
  351. physical

    in volley ball is it an illegal hit if you hit it underhand while ball is in play

    asked by CJ
  352. MATh

    Faith earned 1/3 of her allowance from washing the dishes and 1/6 of her allowance from cleaning her room. How much of Faith $36 allowance was not earned from washing the dishes or cleaning room?

    asked by Dobby
  353. Math

    If A = {1, 2, 3, 4, 5} and B=(1,2, 4, 6, 10}, then what is A U B?

    asked by Anonymous
  354. math

    what whole number does n stand for if the number sentence bleow is true? [n+5]+[3times2]=18

    asked by cindy
  355. Financing

    Reflect on the code of ethics for professional practice. What is your philosophy of financial planning? How do you see yourself carrying out your philosophy in your professional practice?

    asked by troy
  356. 1st grade

    how many different ways can you get to the sum of 4

    asked by Anonymous
  357. Calc

    Find an equation of the tangent line to the graph of the function at the given point. 1 + ln xy = e^(x-y), (1,1)

    asked by Brandon
  358. Business

    what are some good steps for monitoring implementation of electronic medical records?

    asked by lois
  359. math

    find the fith term (a5) of the sequence with the first term a1=10 and for whic each succwssive term is three tenths of the previous

    asked by john
  360. college Chemistry

    Which is not a ground state electron configuration? A. 1s2 B. 1s2 2p1 C. 1s2 2s2 D. 1s2 2s2 2p1

    asked by Ivy
  361. math

    write 1.06X as a sum

    asked by Casey
  362. math

    calculate the infinite sum of a geometric series with first term 15,000 and common ratio by (1-1/10)

    asked by john
  363. algebra 2 quadratic inequalities

    how would I find the solution to x/x+2 + 1/x-1 < 3/2

    asked by raven
  364. chemsitry

    How would you figure-out which one is greater. You have 2.0 moles of H2O and 1.0 moles ofCO2 how would you get the answer.

    asked by sherry
  365. Math

    Jairo ears $256 for 50 hours of work. Write an equation(proportion) to find x his wages for 76 hours of work

    asked by Jason
  366. math

    x intercept3,slope2

    asked by stephny
  367. geography

    who is a famous person from estonia????

    asked by michaela
  368. art

    12 square and value them from white to black

    asked by rakeem
  369. math

    9+8log9 (9X)=81

    asked by francisco
  370. 6th grade

    what is 30 1/4-29 1/3

    asked by Sara
  371. Singing

    I am having a total meltdown.... I want to sing, but my voice is too low! HELP!!

    asked by Justin
  372. MATHE HELP!

    Write an expression that can be used to find the average if these numbers: 7, -2, 10, -4, -9

    asked by Please Help!
  373. science

    as the pressure of two crackers are increased the crackers finally break as the pressure subsides. How is this similar to the situation in California along the San Andreas Fault?

    asked by hunter
  374. 7th grade

    how do you convert 35ibs per minutes to ibs per hour?

    asked by sara
  375. math

    i squared square root -80

    asked by michelle
  376. Math

    which is larger? .605 2/3 7/11 .67

    asked by Dillard
  377. math

    3x^+4x-4=0

    asked by Darling
  378. math

    determination of surds

    asked by ayodele
  379. math

    write a four sentence paragraph about how you do a algorithm problem

    asked by zack
  380. math

    what is 1 4/7 divided by 1 5/6

    asked by Nathaniel